Sure. Just saying there are some setups that either don't work, or don't work completely. Steering wheel controls is a good example. You can go to the product

Sure. Just saying there are some setups that either don't work, or don't work completely. Steering wheel controls is a good example. You can go to the product site for one of those expensive integration units, and their "product fit guide" will show you it works with some cars and not others. And, yes, some cars can fit a head unit even though the opening looks odd. Others can't, at all. Volvo has several cars in that category.